Today AGNC is down 4%, but volume is quite high. Every time the price drops, volume increases. It seems that there are people out there ready to scoop it up every time it gets cheaper. Whether today’s buyers are astute or not, only time will tell.
Also, keep in mind that shares like CEL and AGNC are by nature very volatile, esp. the latter’s price fluctuates wildly with every piece of news. The market is currently digesting what Obama’s win means for the mREIT sector.